Can anybody complex what is the largest subject of 'TB Disease'?

i need to know more almost this. thanks.Can anybody complex what is the largest subject of 'TB Disease'?
Tuberculosis (commonly shortened to TB) is an infection cause by the bacterium 'Mycobacterium tuberculosis', which most commonly affects the lungs (pulmonary TB) but can also affect the central disturbed system (meningitis), lympathic system, circulatory system, genitourinary system, bones, and joints.
Tuberculosis is one of the most deep and common most important infectious diseases today, infecting two billion people or one third of the world's population. Nine million strange cases of the disease, resulting in two million death occur annualy, mostly within developing countries.
Drug resistant latent infection that snuff people when their immune system is down (old, childlike, HIV, ill...)